Water-cooled furnace-door.



NO..789,549, PATENTED MAY 9, 1905.

L. L. KNUX.

WATER GQOLBD PURNAGB DOOR.

APPLlGATION FILED MAR.7,1903.

INVENTOR No.. 789,549 Patented May 9, 1905.

llln'irnn Srarns PATENT Orricn.

LUTHER L. KNOX, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONF- FOURTH TO MONT MURRAY ANI.) ON E-FOURTH TO H. E. IVEISKOPF, OF PITTSBURG, PENNSYLVANIA.

WATER-COOLED FURNACE-DOOFl.

SPECIFICATION forming part of Letters Patent No. 789,549, dated May 9, 1905. Application filed March 7, 1903. Serial No. 146,631.

To all whom, il; may concern: opposite directions 4from the center of the Be it known that I, LUTHER L. KNOX, of casting toward the outlets and from the ends Pittsburg, Allegheny county, Pennsylvania, upwardly and inwardly toward the outlets, 50

have inventedanew and usefulWater-Cooled as indicated by the dotted lines in Fig. 1.

, 5 Furnace-Door, olz which the following is a The object of these inclined inner liaces is to full, clear, and exact description, re'lerence prevent the Aforming of steam-pockets and to being had to the accompanying drawings, carry any steam which collects toward the 'forming part of' this specilication, in whichi outlets for the water from this sill. The 55 Figure 1 is a front elevation showing one lront oi the sill is provided with two cleaning to form of my improved door. Fig. 2 is a vertiopenings, which are closed by screw-plugs 15. cal cross-section. Fig. 3 is ahorizontal cross- The top of the sill is flat to fit against the section, and Fig. 4t is a partial horizontal seclower face ol the body-casting, the rear portion showing a modified form. tion of this 'face being inclined upwardly, as 60 My invention relates to the class of watershown at 16. The water-supply pipe 17 I 5 cooled doors for furnaces, such as openpreferably leads downwardly through the hearth furnaces, heating-furnaces, eine., and hollow body at one liront corner, as shown in is designed to provide an improved`construe- Fig. 3, and projects through registering holes tion which will be long-lived, which will prcinto the hollow sill. From this sill the water 65 vent the formation of steam-pockets, and flows through U-shaped pipes 1S into the holzo which may be cheaply made and repaired. low body and cheeks and circulates therein,

In the drawings, referring lto the 'form of the overflow being taken olii through the pipe Figs. 1, 2, and 3, I show the body of the door 19, which may be set at any desirable level. at 2 as formed of a hollow casting which is inte- 01 near the upper end of the door. I prefer- 70 gral with the hollow side cheeks 3 3. The ably providea peep-hole 20 by coring the 2 5 side cheeks have diverging side walls, as casting, suitable guides 2]. being provided shown at 4, in order to better hold the reiracabove and below it to receive the closingtory material, which is Yfilled in back of the plate. body and between these cheeks. The cast- Instead of forming the side cheeks oi the 75 ing is open at its top and is preferably prodoor hollow and integral with the body I 3o vided with a shoulder or inset portion 5 in may form them separately and secure them its rear wall to receive the `flanged portion 6 to the body. Thus in Fig. t I show the hol of a top cross-rail 7, which is secured. by bolts low body 2 as having a lateral flange 22, the 8. The rail 7 and the body may be provided side cheek 3 being a separatecasting orinem- 8O with lugs 9, arranged in pairs and perforated ber having, preferably, theinnorinclined lace 3 5 for attaching to the means lor raising and 4 and provided with a flange 28, which is lowering the door. The lower 'face of the bolted to the [lange 22. l rail 7 is preferably inclined downwardly and The advantages ol my invention result rearwardly, as shown at l0. At the lower from the simplicity and cheapness et the 85 end of the body-casting I preferably provide door, its long lile, and the avoiding of steam- 4o forwardly-projectingcast'flanges11 1l atoppoclets. The cast construction gives the positc sides, which are bolted to corresponddoor great strength, and it is not liable to ing I'langes 1,2, cast integrally with the d oorcrack. sill 13. This sill is cast in the 'form o'l"a hol- The door may be made of shapes without 9o low closed box with the inner surface or roof casting, and the parts may be varied without 4 5 of its top inclined upwardly from, the back departing from my invention.

toward the front, as shown at 14k. This sur- I claim-- face is also preferably inclined upwardly in 1. A water-cooled furnace-door having a hollow body with a flange at its bottom which projects forwardly in iront of said body, a separate hollow sill secured to the body by a bolt extending through the flange and means for circulating water through the sill and body; substantially as described.

2. A door having a hollow water-cooled sill with an upper outlet, the rool2 of the sill being inclined to direct steam-bubbles toward said outlet; substantially as described.

3. A door having a hollow water-cooled sill with opposite outlets connecting with the door, the roof of the sill being oppositely inclined from the center toward said outlet; substantially as described.

4. A furnace-door having a hollow cast body provided at its bottom with ilanges projecting forwardly in front of the body, a hollow cast sill having liront projecting Allanges removably bolted to the body-flanges, said securing means being accessible when the door is in place, and external front pipes connecting the body and sill; substantially as described.

5. A hollow water-cooled door having hollow side cheeks, 'a hollow sill extending the entire width of the door and removably secured thereto, and pipes for circulating cooling fluid through the sill, the door and the cheeks; substantially as described.

6. A hollow 'furnace-door having hollow side cheeks, and a hollow lower sill removably secured to the body, and pipes for circulating fluid through the sill, the body and the side cheeks; substantially as described.

7. A hollow water cooled urnacedoor having a vertical back plate, and an inner transverse top sill removably secured to the door by bolts extending through its back plate and terminating within the hollow water-containing cavity or' the door; substantially as described.

S. A furnace-door having a hollow body with bottom ilanges projecting forwardly in `front of the body, a hollow cross-sill removably bolted to said front ilanges, external pipe connections between the sill and body, and a removable top sill secured to the inner portion of the body by bolts extending through the back plate of said body; substantially as described.

9. A hollow water-cooled door having an open top, a hollow sill secured to the lower part of the door, and having outlet-pipes leading to the hollow door, the sill being arranged to direct any steam to said connecting-pipes` and means Vl'or 'circulating a cooling lluid through the door and sill; substantially as described.

In testimony whereof l have hereunto set my hand.

LUTHER L. KNOX.

Witnesses:

GEO. B. BLEMING, H. M. CoRwrN. 

